I is a bit of a thick bundle and I’m looking for a case to hold all of the components.

I was hoping that this knowledgeable group of people here might be able to steer me in the correct direction.

The question is, how can I/do I go from the physical being to a 3D (.stl) files to print out a case. I realize I probably need some software. I do have OpenSCAD installed, but I don’t have a 3D scanner to use.

Is there a way to import the dimensions of the boards into a software program to try and build something?

I use freecad to do all my work. I’d just draw it to meet your needs/specs. From there you should be able to either 3D print OR CNC machine your part which is usually what I prefer to do.

Nevertheless, with freecad your imagination is the only limit. IF you are worried about using a parametric program. Don’t be timid, there are several good tutorials on youtube. You can get to where you need to be in no time flat.